Combination rule



OTTO L. ENG-STROM, OF SOUTH BEND, .INIDANL` GOBBNATIDN RULE.

Application filed September 20, 1921. Serial No. 591,965.

To all 107101772.- 't muy concern:

Be it known that l, Orto li. llNes'rncir, a citizen ot the United States, residing at South Bend, in the county ot St. Joseph. and State ont indiana, have invented certain new and useful improvements in Combination Rules, ot which the following is a specification.

r.This invention relates to combination implements in which various tools are coactively associated and in interdependent relations, and has for one oit its objects to siniplify the construction and increase the eiliciency and utility ot devices of this character.

lilith these and other objects in view, the invention consists in certain novel teatures ot construction as hereinafter shown and described and then specilically pointed out in the claim, and in the drawings illustrative of Jdie preferred embodiment ot the invention Figure 1 is a side elevation of the improved implement partly in section, illustrating the use as dividers or as inside calipers.

Fig. 2 is a view with the legs oit the iniplement arranged tor use as a square, and as inside calipers.

Fig. 3 is a sectional detail ci the inside calipers construction.

Fig. 4 is a section on the line Ll--l ot ltig. 1.

Fig. 5 a section of one ot the legs of the implement on the line oi" Fig. 1.

The improved implement comprises two main members or legs 1() and 11, one of which is preferably Yl`sliaped transversely, illustrated in Fig. 5, the legs being united at one end by a rule joint which includes semi-circular portions 12 and pivot pin let.

nu extension 15 is formed on the tree end of the leg member 11 and terminates in a point 16 preferably ot tempered steel to form one point ol' a pair of dividers, and projecting laterally Jfrom the extension 15 is a spur like member 17 which constitutes one part of an inside caliper device, as hereafter described.

rlhe leg member 11 is also provided with a level bulb, indicated conventionally at 18, and a relatively large opening 19 therethrough at one end.

The other leg l member is provided with a longitudinally directed guide socket 2O opening through the end ot the leg, and movably disposed in this socket is a bar 21, the latter having an elle and. a reduced eX- tension 23, 'terminating in a steel point 2e. The extension also carries a lateral spur 25.

The extension 23 with. its point. 2l1- forms the other CiTiei/nber'" of the divider device and coacts with the extension and its point 16, while the spur 25 forms the other member of the inside caliper device and coacts with the spur 17 of the extension 15. The leg member 10 is reduced at its free end as shown at 26, and provided with a lateral extension 27 whose outer tace forms the other aw of the outside caliper device and coact-s with the other jaw member' 22.

A clamp screw 28 is tapped through the jaw member 27 to engage the bar 21 and hold it in adjusted position.

The members 22 and 26 thus coact to produce an eitectual outside caliper device, as illustrated in Figs. 2 and 3, while the spurs 17 and 25 coact to provide an eilectual inside caliper device.

The members 10 and 11 are formed with longitudinally directed kerts at their jointed ends to receive a semi-circular plate 29, the latter being rigidly connected as by rivets 30 to one ot the leg members for instance the leg member 11, and is graduated in degrees as shown at 31 and constitutes a protraetor member in coaction with the other leg inember 10. rlhe leg` member 10 is also provided with an opening 32, and movable in the opening is a locking block 33 having a urved groove in one face to engage over the acent curved edge oit the protractor plate 29, as illustrated in Fig. 4l.

rllhe block 33 is formed with. a threaded stem 34 with which a cylinder nut 35 engages with its surface milled and operable through the opening 31. By this means a simple device is produced whereby the leg member 10 may be locked in position relative to the protractor plate.

The members 10 and 11 are graduated in inches and fractions of inches, and thus constitutes a convenient measuring rule, and the bar 21 is likewise graduated to denote the width of the space between the caliper jaws 22 and 26.

ylhe bar 21 is :termed with a longitudinally directed gnideway, indicated at 36, and

adapted to receive the inner end ot a stopl `Inoval 'from the member l0, While at the same time left free tobe adjusted longitudinally of the leg member Within the range of the guideivay 36, as Will be obvious.l

The improved implement Will be constructed of metal except the level bulb 18, and of any required size or capacity, and will not necessarily exceed in size an ordinary two toot rule, besides the projecting portion oiC the protractor pla-te.

rlhe improved implement will be found very useful 'or mechanics in doing various pieces of Work, as it is adapted tol various v uses as will be obvious.

rThe preerred embodiment of the invention is disclosed in the drawings and set forth in the specification, butr it will be understood that modifica-tions within the scope of the claim may be made in the construction 'without1 departing Jrroni the principle or the invention or sacriiicing any or its advantages.

Having thus described the invention, what is claimed as new is An implement of the class described Lcomprising coaeting o leg members pivotally united at one end` and provided respectively With longitudinally directed lrerfs in their pivoted ends, one 'of said leg members having transverse slots communicating Withvthe kerl thereof, a graduatedprotractor Aplate engaging in said lierfs, means for rigidly connecting said protractor plate to one of said leg members, a loclringbloclr movable in said slot, and means for forcibly compressing` said block against said protractor plateV to lock the leg member which carries the block and slot in adjusted position.

In testimony whereof, l a'llix my 'signature hereto. f

- orrori. n'NesrnoM. 

